Not sure what your exact issue is, but my driver's side door used to have a trick to opening it from the inside. While putting pressure down on the unlock lever with your thumb you then had to pull on the handle with your index finger. It was a cool one-handed trick.
Going along with that if you tried to unlock the door from the outside you had to turn it to the unlock position, keep the key there, open the door, and then turn and remove the key. Otherwise you would just lock the door back on yourself.
The last time I had my door panels off to paint them I started looking around and stuff in there. Turns out there's a tab on the door lock cylinder that if bent out of place enough will cause this to happen. I bent it back and no more tricks to unlocking the driver's door or getting out.